summaryrefslogtreecommitdiff
path: root/src/gallium/include/pipe/p_util.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/gallium/include/pipe/p_util.h')
-rw-r--r--src/gallium/include/pipe/p_util.h408
1 files changed, 408 insertions, 0 deletions
diff --git a/src/gallium/include/pipe/p_util.h b/src/gallium/include/pipe/p_util.h
new file mode 100644
index 0000000000..d7da2801c9
--- /dev/null
+++ b/src/gallium/include/pipe/p_util.h
@@ -0,0 +1,408 @@
+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#ifndef P_UTIL_H
+#define P_UTIL_H
+
+#include "p_compiler.h"
+#include "p_debug.h"
+#include <math.h>
+
+
+#ifdef WIN32
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+void * __stdcall
+EngAllocMem(
+ unsigned long Flags,
+ unsigned long MemSize,
+ unsigned long Tag );
+
+void __stdcall
+EngFreeMem(
+ void *Mem );
+
+#ifdef __cplusplus
+}
+#endif
+
+static INLINE void *
+MALLOC( unsigned size )
+{
+ return EngAllocMem( 0, size, 'D3AG' );
+}
+
+static INLINE void *
+CALLOC( unsigned count, unsigned size )
+{
+ void *ptr = MALLOC( count * size );
+ if( ptr ) {
+ memset( ptr, 0, count * size );
+ }
+ return ptr;
+}
+
+static INLINE void
+FREE( void *ptr )
+{
+ if( ptr ) {
+ EngFreeMem( ptr );
+ }
+}
+
+static INLINE void *
+REALLOC( void *old_ptr, unsigned old_size, unsigned new_size )
+{
+ void *new_ptr;
+ if( new_size <= old_size ) {
+ return old_ptr;
+ }
+ new_ptr = MALLOC( new_size );
+ if( new_ptr ) {
+ memcpy( new_ptr, old_ptr, old_size );
+ }
+ FREE( old_ptr );
+ return new_ptr;
+}
+
+#define GETENV( X ) NULL
+
+#else /* WIN32 */
+
+#define MALLOC( SIZE ) malloc( SIZE )
+
+#define CALLOC( COUNT, SIZE ) calloc( COUNT, SIZE )
+
+#define FREE( PTR ) free( PTR )
+
+#define REALLOC( OLDPTR, OLDSIZE, NEWSIZE ) realloc( OLDPTR, NEWSIZE )
+
+#define GETENV( X ) getenv( X )
+
+#endif /* WIN32 */
+
+#define MALLOC_STRUCT(T) (struct T *) MALLOC(sizeof(struct T))
+
+#define CALLOC_STRUCT(T) (struct T *) CALLOC(1, sizeof(struct T))
+
+
+/**
+ * Return a pointer aligned to next multiple of N bytes.
+ */
+static INLINE void *
+align_pointer( void *unaligned, uint alignment )
+{
+ if (sizeof(void *) == 64) {
+ union {
+ void *p;
+ uint64 u;
+ } pu;
+ pu.p = unaligned;
+ pu.u = (pu.u + alignment - 1) & ~(uint64) (alignment - 1);
+ return pu.p;
+ }
+ else {
+ /* 32-bit pointers */
+ union {
+ void *p;
+ uint u;
+ } pu;
+ pu.p = unaligned;
+ pu.u = (pu.u + alignment - 1) & ~(alignment - 1);
+ return pu.p;
+ }
+}
+
+/**
+ * Return memory on given byte alignment
+ */
+static INLINE void *
+align_malloc(size_t bytes, uint alignment)
+{
+#if defined(HAVE_POSIX_MEMALIGN)
+ void *mem;
+ (void) posix_memalign(& mem, alignment, bytes);
+ return mem;
+#else
+ char *ptr, *buf;
+
+ assert( alignment > 0 );
+
+ ptr = (char *) MALLOC(bytes + alignment + sizeof(void *));
+ if (!ptr)
+ return NULL;
+
+ buf = (char *) align_pointer( ptr + sizeof(void *), alignment );
+ *(char **)(buf - sizeof(void *)) = ptr;
+
+ return buf;
+#endif /* defined(HAVE_POSIX_MEMALIGN) */
+}
+
+/**
+ * Free memory returned by align_malloc().
+ */
+static INLINE void
+align_free(void *ptr)
+{
+#if defined(HAVE_POSIX_MEMALIGN)
+ FREE(ptr);
+#else
+ void **cubbyHole = (void **) ((char *) ptr - sizeof(void *));
+ void *realAddr = *cubbyHole;
+ FREE(realAddr);
+#endif /* defined(HAVE_POSIX_MEMALIGN) */
+}
+
+
+
+/**
+ * Duplicate a block of memory.
+ */
+static INLINE void *
+mem_dup(const void *src, uint size)
+{
+ void *dup = MALLOC(size);
+ if (dup)
+ memcpy(dup, src, size);
+ return dup;
+}
+
+
+
+#define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
+#define MIN2( A, B ) ( (A)<(B) ? (A) : (B) )
+#define MAX2( A, B ) ( (A)>(B) ? (A) : (B) )
+
+#define Elements(x) sizeof(x)/sizeof(*(x))
+#define Offset(TYPE, MEMBER) ((unsigned)&(((TYPE *)NULL)->MEMBER))
+
+/**
+ * Return a pointer aligned to next multiple of 16 bytes.
+ */
+static INLINE void *
+align16( void *unaligned )
+{
+ return align_pointer( unaligned, 16 );
+}
+
+
+static INLINE int align_int(int x, int align)
+{
+ return (x + align - 1) & ~(align - 1);
+}
+
+
+
+#if defined(__MSC__) && defined(__WIN32__)
+static INLINE unsigned ffs( unsigned u )
+{
+ unsigned i;
+
+ if( u == 0 ) {
+ return 0;
+ }
+
+ __asm bsf eax, [u]
+ __asm inc eax
+ __asm mov [i], eax
+
+ return i;
+}
+#endif
+
+union fi {
+ float f;
+ int i;
+ unsigned ui;
+};
+
+#define UBYTE_TO_FLOAT( ub ) ((float)(ub) / 255.0F)
+
+#define IEEE_0996 0x3f7f0000 /* 0.996 or so */
+
+/* This function/macro is sensitive to precision. Test very carefully
+ * if you change it!
+ */
+#define UNCLAMPED_FLOAT_TO_UBYTE(UB, F) \
+ do { \
+ union fi __tmp; \
+ __tmp.f = (F); \
+ if (__tmp.i < 0) \
+ UB = (ubyte) 0; \
+ else if (__tmp.i >= IEEE_0996) \
+ UB = (ubyte) 255; \
+ else { \
+ __tmp.f = __tmp.f * (255.0f/256.0f) + 32768.0f; \
+ UB = (ubyte) __tmp.i; \
+ } \
+ } while (0)
+
+
+
+static INLINE unsigned pack_ub4( unsigned char b0,
+ unsigned char b1,
+ unsigned char b2,
+ unsigned char b3 )
+{
+ return ((((unsigned int)b0) << 0) |
+ (((unsigned int)b1) << 8) |
+ (((unsigned int)b2) << 16) |
+ (((unsigned int)b3) << 24));
+}
+
+static INLINE unsigned fui( float f )
+{
+ union fi fi;
+ fi.f = f;
+ return fi.ui;
+}
+
+static INLINE unsigned char float_to_ubyte( float f )
+{
+ unsigned char ub;
+ UNCLAMPED_FLOAT_TO_UBYTE(ub, f);
+ return ub;
+}
+
+static INLINE unsigned pack_ui32_float4( float a,
+ float b,
+ float c,
+ float d )
+{
+ return pack_ub4( float_to_ubyte(a),
+ float_to_ubyte(b),
+ float_to_ubyte(c),
+ float_to_ubyte(d) );
+}
+
+#define COPY_4V( DST, SRC ) \
+do { \
+ (DST)[0] = (SRC)[0]; \
+ (DST)[1] = (SRC)[1]; \
+ (DST)[2] = (SRC)[2]; \
+ (DST)[3] = (SRC)[3]; \
+} while (0)
+
+
+#define COPY_4FV( DST, SRC ) COPY_4V(DST, SRC)
+
+
+#define ASSIGN_4V( DST, V0, V1, V2, V3 ) \
+do { \
+ (DST)[0] = (V0); \
+ (DST)[1] = (V1); \
+ (DST)[2] = (V2); \
+ (DST)[3] = (V3); \
+} while (0)
+
+
+static INLINE int ifloor(float f)
+{
+ int ai, bi;
+ double af, bf;
+ union fi u;
+
+ af = (3 << 22) + 0.5 + (double)f;
+ bf = (3 << 22) + 0.5 - (double)f;
+ u.f = (float) af; ai = u.i;
+ u.f = (float) bf; bi = u.i;
+ return (ai - bi) >> 1;
+}
+
+
+#if defined(__GNUC__) && defined(__i386__)
+static INLINE int iround(float f)
+{
+ int r;
+ __asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");
+ return r;
+}
+#elif defined(__MSC__) && defined(__WIN32__)
+static INLINE int iround(float f)
+{
+ int r;
+ _asm {
+ fld f
+ fistp r
+ }
+ return r;
+}
+#else
+#define IROUND(f) ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
+#endif
+
+
+/* Could maybe have an inline version of this?
+ */
+#if defined(__GNUC__)
+#define FABSF(x) fabsf(x)
+#else
+#define FABSF(x) ((float) fabs(x))
+#endif
+
+/* Pretty fast, and accurate.
+ * Based on code from http://www.flipcode.com/totd/
+ */
+static INLINE float LOG2(float val)
+{
+ union fi num;
+ int log_2;
+
+ num.f = val;
+ log_2 = ((num.i >> 23) & 255) - 128;
+ num.i &= ~(255 << 23);
+ num.i += 127 << 23;
+ num.f = ((-1.0f/3) * num.f + 2) * num.f - 2.0f/3;
+ return num.f + log_2;
+}
+
+#if defined(__GNUC__)
+#define CEILF(x) ceilf(x)
+#else
+#define CEILF(x) ((float) ceil(x))
+#endif
+
+static INLINE int align(int value, int alignment)
+{
+ return (value + alignment - 1) & ~(alignment - 1);
+}
+
+
+/* util/p_util.c
+ */
+extern void pipe_copy_rect(ubyte * dst, unsigned cpp, unsigned dst_pitch,
+ unsigned dst_x, unsigned dst_y, unsigned width,
+ unsigned height, const ubyte * src,
+ int src_pitch, unsigned src_x, int src_y);
+
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-13 18:24:07 +0000